Self and samuel f



(No Model.)

H. DUGMORE. METALLIC WINDOW GASEMBNT.

No. 414,944. Patented Nov. 12, 1889.

7 T/t EEEES- M @Ifl/E/JTDR: I a J UNITED STATES PATENT OFFICE.

HENRY @UGMORE, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR TO HIM- SELF AND SAMUEL F. BOYLE, OF SAME PLACE.

M ETALLIC WIN DOW-CASEM ENT.

SPECIFICATION forming part of Letters Patent No. 414,944, dated November 12, 1889.

Application filed February 25, 1889. Serial No. 301,024. (No model.

To all whom it may concern.-

Be it known that I, HENRY DUGMORE, of Somerville, in the county of Middlesex, State of Massachusetts, have invented a certain new and useful Improvement in Metallic Window-Oasements, of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is an elevation of a portion of my improved window-casement, showing the staybar; Fig. 2, a top plan view of the same; Fig. 3, a sectional elevation showing the locking device; Fig. 4, a top plan view of the same, and Fig. 5 a perspective view showing the construction of the casement at the corners.

Like letters and figures of reference indicate corresponding parts in the different figures of the drawings.

My invention relates especially to that class of easements which are particularly adapted for use in warehouses, fire-proof buildings, &c.; and it consists in certain novel features, as hereinafter fully set forth and claimed, the object being to produce a simpler, cheaper, and more effective device of this character than is now in ordinary use.

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation.

In the drawings, A represents the body of the easement, and B the swinging sash,these parts being preferably formed of wroughtiron. The body A is constructed of grooved iron L-shaped in cross-section, as shown in Figs. 2 and 4, the cross-bars b and side bars 61 being dovetailed together at f, Fig. 5, and the joints brazed in the ordinary manner. The sash is constructed of similarly shaped grooved iron, its side and cross bars 19 d being secured together in like manner, but so disposed that the groove opens outwardly at right angles to the groove in the body-bars, as best shown in Fig. 4. The inner wall 9 of the sash-bars is also constructed considerably wider than the corresponding wall h of the body-bars, being nearly equal to the width of the groove in said body-bars. The sash is secured to the body by hinges a, sunken into the sash side bars, the parts being so disposed that when the sash is closed the outer walls of the groove in the sash-bars will engage the edge of the corresponding wall of the bodybars, the inner wall of the sash-bar groove extending across the body-bar groove and engaging the edge of the inner wall thereof. To the lower sash-bar b is secured inwardlyprojecting ears k, in which a horizontally-arranged stay-bar m is pivoted by one end. A revolving block 10 is disposed on the lower body-bar b, said block being provided with a horizontal slot q, through which the stay-bar is fitted to slide. A key-block a" is disposed in the slot q, its purpose being to prevent the stay-bar from binding therein. A stop t is secured on the free end of the stay-bar, and a thumb-screw 'v is fitted to work vertically in the block 19 and secure said bar in position in said block. An outwardly-projecting lug w is secured centrally to the side bar (1 opposite the hinges, and a bell-crank lever 00 is pivoted thereto, one arm of said lever being provided with a handle and its opposite arm adapted to engage the inner face of the body-bar d and prevent the sash from being opened when the handle is depressed.

In the use of my improvement, by turning out the screw 1) the sash B may readily be swung open on its hinges, as shown by dotted lines in Fig. 2, and secured in such position.

By constructing and disposing the sash and bodybars as described two chambers z .2 Fig. 4, are thereby formed when the sash is closed, said chambers serving as gutters to carry the water that may be driven in between the sash and body bars into the corresponding chambers formed by the lower crossbars 17 b thus preventing it from passing into the building. Moreover, the easement as thus constructed is practically air-tight, the current of air ,which may enter between the bars being so broken and retarded by the inner walls 9 h thereof that little or none of it can enter the building.

By dovetailing and brazing the joints of the frame, as described, it is prevented from sagging or becoming misshapen, as frequently happens when the bars are bolted together.

Having thus explained my invention, what I claim is 1. A metallic window-casement comprising a body and sash hinged together and construeted of L-shaped grooved bars so disposed that the walls of the sash-bars are at right angles to and overlap the edges of the body-bar walls, forming air-chambers therewith, substantially as and for the purpose set forth.

2. A metallic window-casement comprising a sash and body hinged together and constructed of L-shaped grooved bars dovetailed and brazed at the joints, the parts being so disposed that the groove-walls of the sashbars engage those of thebody-bars and form airchambers therewith when the sash is closed, substantially as described.

111 a metallic window-casement, the combination of a body constructed of L-shaped grooved bars, a sash hinged to said body and formed of similarly-grooved bars so disposed that the walls of said groove engage the groove-walls of the body at right angles and form air-chambers therewith, and a stay-bar pivoted to said sash and sliding in a pivoted block on said body, substantially as described.

4. In a metallic window-casement, the combination of abody formed of L-shaped grooved bars dovetailed together, asash pivoted thereto and constructed in like manner, the groovewalls of said sash being at right angles to those of the body and forming chambers therewith when the sash is closed, a stay-bar pivoted in cars on said sash, a slotted block pivoted on said body in which said bar slides, a thu1nb-screw in said block, and a key-block in said slot, all being arranged to operate substantially as described.

5. In a metallic window-casement, the combination of the body A, comprising the L- shaped bars 11 d, dovetailed together, the sash B, hinged to said body and comprising the L-shaped bars b (1 the stay-bar m, pivoted in ears 7c on said sash and provided with the stop 15, the slotted block pivoted to said body, the key-block r in said slot, the thumbscrew 1;, and the locking-lever no, pivoted on the lug 10, secured to said sash, all being constructed and arranged to operate substantially as described.

HENRY DUGMORE.

Witnesses:

HELEN M.'FEEGAN, O. M. SHAW. 

